<template>
    <div class="list" ref="wrapper">
        <div>
            <div class='area'>
                <div class="title border-topbottom">当前城市</div>
                <div class="button-list">
                    <div class="button-wrapper">
                        <div class="button">
                            北京
                        </div>  
                    </div>
                </div>
            </div>
            <div class='area'>
                <div class="title border-topbottom">热门城市</div>
                <div class="button-list">
                    <div class="button-wrapper" v-for="item of hot" :key="item.id">
                        <div class="button">{{item.name}}</div>  
                    </div>
                </div>
            </div>
            <div 
              class='area' 
              v-for="(item,key) of cities" 
              :key="key"
              :ref="key"
            >
                <div class="title border-topbottom">{{key}}</div>
                <div class="item-list">
                    <div class="item border-bottom" v-for="innerItem of item" :key="innerItem.id">
                        {{innerItem.name}}
                    </div>
                </div>
            </div>
        </div>
    </div>
</template>

<script>
import Bscroll from 'better-scroll'
    export default {
        name:'CityList',
        props: {
            hot:Array,
            cities:Object,
            letter:String
        },
        mounted () {
            this.scroll = new Bscroll(this.$refs.wrapper)
        },
        watch: {
            letter () {
                if(this.letter) {
                    const element = this.$refs[this.letter][0]
                    this.scroll.scrollToElement(element)
                }
            }
        }
    }
</script>

<style lang="stylus" scoped>
    .border-topbottom{
      &:before{
          border-color:#ccc;
      }
      &:after{
          border-color:#ccc;
      }
    }
    .border-bottom{
      &:before{
          border-color:#ccc;
        }
    }
    .list{
        overflow:hidden;
        position:absolute;
        top:1.58rem;
        left:0;
        right:0;
        bottom 0;
    }
    .title{
        line-height:.54rem;
        background :#eee;
        padding-lefrt:.2rem;
        color:#666;
        font-sieze:.26rem;
    }
    .button-list{
        overflow:hidden;
        padding:.1rem .6rem .1rem .1rem;
    }
    .button-wrapper{
        float:left;
        width:33.33%;
    }
    .button{
        margin:.1rem;
        padding:.1rem 0;
        text-align:center;
        border:.02rem solid #ccc;
        border-radius:.06rem;
    }
    .item-list .item {
        line-height:.76rem;
        color:#666;
        padding-left:.2rem;
    }
</style>
